Apparatus for coating cylindrical vessels



151125151950 w. s cHENAULT 2,519,177

APPARATUS FOR QOATING CYLINDRICA.. VESSELS Filed Maron 2, 1949 2 sheets-sheet 1 956MHz A INVENTOR.

Wood/ord Sia/neg Hanau/ v BY A TTORNEYS Aug. l5, 1950 w. s. cHENAul- T 2,519,177

APPARATUS FOR coA'lrING CYLINDRICAL vEssELs Filed March 2, 1949 2 Sheets-Sheet 2 A 7'7' ORNE YS Patented ug. 155,2 'l95` land I l lemme.

ritieni eiatsifto apparatsfforfcoat Mo paftulany; the-*inf ,t Il b Eig -is' aiplanvewlof-the apparatus partiallyf g meralsff I' and-i12 are v'provided Y at th Iside?fandfexit'fside"y respectively -of thlturntable mechanism, indicated generally by numeral'S.

'Conveyor I comprises a plurality of parallel rollers 4 mounted on spind1es5 which are journalleifV in" side l"`a"ils` Conveyor-f2 is of similar consu-neuemandreomprieesfpluraiity of rollers arefjournaneurm 1 imedlvwrmerully:

'n: the upright position.l

`drawings like numerals f-designate'like' witlr longitudinalr 'serrationsyf as 'shown finf' Y greaterI'detai-l Iin Figs.1 RollerfH and "driving"` roller fare 4provided with va ahge '3| fan'd"32",`A

respectively-,r nearfth'e outer end.A Guides`33' and 31Min line-witl1`f the plane of` tlie'flange'l;r and" guiolesr and-36y in line Witli"thet`plane of the' lange-SZ, Iare'provided above and near the outer er1-ds ofthe roller`s.

Side mima-- Guide sa' is carried byhrackets 38'- atta'ched to side-rait 120'- Gruides4v 35 andl 3by are similarly mounted on'side rail` 23 by the' of brackets Erand-"40,Y respectively;

Side rail-sf? 2%: and f 2 IY lare sup'r'iortedV by" 'crossl members "nl Iian'd il" which' alsof support Side rail?, t

Efand 123.- The dross"'members4 4I "and 1T-are" supported4 Yas by' the `concrete*foundations 43': and? 441W' f 'Carriedfbyftlie'conveyor# is the lcross member'- ing stop member ha'ving its. upper 'end'491 whenVJ inA the :vert-ical f position,y extending 'above' the' top of rollers'lll y i Cro-ss Amerr-ib'ers 553,-" carried by side rails 20 and" ZIi andf22i and 23; respectively,fsupport a, pair' ofV identical-'stop/members 5 I f which are attached to the cross member by' brackets V52; As shownV in"greater detailin- Fig. 4, each 0f these stop membershas'a rotatable head portion 53 mountedy I upon'the upper end-545 of thefspindle 55; a Cotter'4`A pinv 55 inserted in'I the'holei.' serves to' retainJ the -head 'portionf on' the vspindle. The" spindle fis capable 'offlimited 'vertical movement in:Vv the guides 58"'and 59 'which are held by the bracketI aferrmgwwfthe mimbrefmthanismvfs chest-far 52s 'TA 'pin finserted' in hole GI in spindle 55 serve'sas ai stop" limiting the upward travel of the constantly urgesupwardlyfthe 'spindle 55? pairs"v asigne For actuating the stop members, the differential motor 53 is provided. Its piston rod 64 is linked to the two stop members 5 I. As shown, this linkage is composed of a crank 85, one end of which is slotted to receive the pin 86 in the piston rod 84. The other end of the crank 85 is attached to the shaft 6'! carried by brackets 88 on cross member 42. Attached to the ends of shaft 8l are cranks 89, the slotted outer ends of which engage pins l in the lower ends of spindles 55. Each of the lower ends of spindles 55 is connected by a exible cable 'Il running through pulleys 12 to the lower end of the swinging stop member 48 so that movement of piston rod 54 into differential motor 63 raises spindle 55 and pulls the cord 1I, thereby .swinging the stop member 48 toward .or into the vertical position. Outward motion of piston rod 84 moves spindle 55 downward and allows stop member to tilt as shown in dotted outline.

More particularly referring to Figs. and 6, there is shown the spray booth, indicated generally by numeral I3, which is arranged to enclose the spray-coating space provided over the turntable 3 and a portion of the two conveyors I and 2. As shown, the spray booth 'I3 is provided with side walls I4 and I5, one on each side of the turntable 3. The top edges'of the walls support the roof sectionv'l. Anopening I'I is provided in wall l5, the opening being connected by a duct 'I8 to the vent stack 78. The lower end of the stack rests upon the foundation 43. Y The ends of the booth are open.

Y Suitable spray heads 88, 8I, 82, 83, and 84 may be provided, as shown in Fig..6, so as to direct the coating material onto the surfaces of the container to be coated, one such container being shown in dotted outline -on the turntable.

In operation the cylindrical vessels to be coated are placed upright upon the feeding conveyor I as shown at 89, Fig. 2, the bottom of vessel 89 abutting against the head 49 of the swinging stop member 48 (Fig. 2), which is initially in the upright position. When spray-coating the vessels is to take place, each one is led in turn onto the turntable by swinging the stop member 48 out of the way by operating the differential motor 63 so as to cause the piston rod S4 to move outwardly aY sufficient distance. This movement of the pistony rod lowers the spindles 55 and thus allows the cords 'Il to release the stop 48. As soon as the bottom of the vessel has passed the stop member 48, the top 48 is brought into the upright position again to act as a stop preventing the next vessel (88) on the conveyor I from passing toward the turntable. At the same time the same movement ofthe piston rod 84 raises the spindle 55, causing the rotatable head 53 to project above the level of the rollers of the turntable 3 and thereby act asa stop to retain on the turntable the vessel released from behind the stop 48. Roller 25 is revolved by suitable driving means,such as pulley 85, which is attached to the shaft 28, the pulley being belted by belt 88 to the reduction gear 81 driven by motor 88. The serrated surface 30 of the roller 25 engages the bottom edge or chime 98 of each vessel EBI (see Fig. 3) in turn, thereby imparting a rotational motion to it as indicated in Fig. 5. The vessel revolves in situ by virtue of the stop members 5I and the guides 33, 34, 35, and 38. While thus revolving on the turntable the coating material is sprayed upon the outer surface of the vessel from the spray nozzles 8D, 8 I, 82, 83, and 84, of which nozzle 80 is arranged to spray-coat the top of the vessel, 84 the bottom,

and ,8l to 83. inclusive, the side of the vessel.

After the desired thickness of coating material is deposited upon the surface of the vessel the stops 5I are lowered and 49 is swung out of the way by moving the piston rod 54 outwardly from the differential motor 63 a sufcient distance.

The vessel on the turntable is thus permitted to move off onto conveyor2, as indicated by 92, and another vessel from conveyor I allowed to move onto turntable 3. The stops 48 vand 5I are raised and spraying is repeated as before. Thus each vessel of a continuous series of vessels may be coated.

Among the advantages of the invention are that fully loaded vessels may be completely covered externally with a paint or varnish or the like with greatly reduced expenditure of labor, and a more uniform coating is obtained.

I claim:

1. An apparatus for spray-coating the outer surface of a right cylindrical vessel which comprises in combination a turntable on which the vessel to be coated is supported, a loading conveyor means adjacent to the entrance of the turntable, an unloading conveyor adjacent to the exit of the turntable, said turntable comprising two parallel rows of rollers, the rollers in each row being `arranged in parallel and tangent to the underside of a horizontal plane, each of said rows comprising three rollers, driving means connected to the middle roller of one of the rows of rollers, said driving means being adapted to revolve the said middle roller, the said middle roller having serrations along its face adapted to frictionally engage the lower edge of a vessel resting thereon and impart thereto rotational motion, and guide members at each side of theturntable adapted to prevent the vessel supported by the turntable from moving sidewise off the turntable.

2. An apparatus for spray-coating the outer surface of a right cylindrical vessel which comprises in combination a turntable on which the vessel to be coated is supported, a loading conveyor means adjacent to the entrance of the turntable, an unloading conveyor adjacent to the exit of the turntable, said turntable comprising two parallel rowsof rollers, the rollers in each row being arranged in parallel and tangent to the underside of a horizontal plane, each of said rows comprising three rollers,A driving means connected to the middle roller Vof one of the rows of rollers, said driving means being adapted to revolve the` said middle roller, the said middle roller having serrations along its face adapted to frictionallyengage the lower edge of'a vessel f. resting thereon and impart thereto rotational and stop means for simultaneously moving thestops out of the way of vessels to permit replacing of a vessel on theY turntable withone from the loading conveyor means.

3. An apparatus for spray-coating the outer surface of a right cylindrical vessel which comprises in combination a turntable on which the vessel to be coated is supported, a loading coney veyor means adjacent-to Vthe lentrance of the turntable, an unloading conveyor adjacent to the exit of the turntable, said turntable comprising two parallel rows of rollers, the rollers lin each row being arranged in parallel and tangent to the underside of a horizontal plane, each of said rows comprising three rollers, driving means connected to the middle roller of one of the rows of rollers, said driving means being adapted to revolve the said middle roller, the said middle roller having serrations along its face adapted to frictionally engage the lower edge of a vessel resting thereon and impart thereto rotational motion, guide members at each side of the turntable adapted to prevent the vessel supported by the turntable from moving sidewise off the turntable, a pair of spaced apart stop members adjacent the unloading conveyor adapted to prevent a vessel on the turntable from moving from the turntable to the unloading conveyor, a stop means adjacent to the entrance to the turntable adapted to prevent movement of a vessel from the loading conveyor onto the turntable, means connecting the said stop members and stop means for simultaneously moving the stops out of the way of vessels to permit replacing of a vessel on the turntable with one from the loading conveyor means, and spray nozzles adapted to direct a spray of a liquid coating material onto the external surface of a vessel while upon the turntable.

4. An apparatus for spray-coating the outer surface of a right cylindrical vessel which comprises in combination a turntable on which the vessel to be coated is supported, a loading conveyor means adjacent to the entrance of the turntable, an unloading conveyor adjacent to the exit of the turntable, said turntable comprising two parallel rows of rollers, the rollers in each row being arranged in` parallel and tangent to the underside of a horizontal plane, each of said rows comprising three rollers, driving means connected to the middle roller of one of the rows of rollers, said driving means being adapted to revolve the said middle roller, the said middle roller having serrations along its face adapted to frictionally engage the lower edge of a vessel resting thereon and impart thereto rotational motion, guide members at each side of the turntable adapted to prevent the vessel supported by the turntable from moving sidewise off the turntable, a pair of spaced apart stop members adjacent the unloading conveyor adapted to prevent a vessel on the turntable from moving from the turntable onto the unloading conveyor, a stop means adjacent to the entrance to the turntable adapted to prevent movement of a vessel from the loading conveyor onto the turntable, means connecting the said stop members and stop means for simultaneously moving the stops out of the way of vessels to permit replacing of a vessel on the turntable with one from the loading conveyor means, spray nozzles adapted to direct a spray of a liquid coating material onto the external surface of a vessel while upon the turntable, and a chamber over the turntable, said chamber being open at both the entrance and the exit of the turntable and said chamber being adapted to form a housing for the vessel to be spray-coated.

WOODFORD SIDNEY CHENAULT.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,700,697 Draper Jan. 29, 1929 1,742,393 Hooper et al Jan. 7, 1930 2,275,437 Hopkins Mar. 10, 1942 2,287,356 Newman June 23, 1942 2,442,179 Shanklin et al May 25, 1948 

